畅饮

畅饮	chàng yǐn	to have a few drinks / to drink to one's heart's content
畅	chàng	free / unimpeded / smooth / at ease / free from worry / fluent
饮	yǐn	old variant of 饮
饮	yǐn	to drink
饮	yìn	to give (animals) water to drink